diff mbox

[V2,5/9] clk: tegra: pll: Fix potential sleeping-while-atomic

Message ID 1452799478-14791-6-git-send-email-rklein@nvidia.com
State Accepted, archived
Headers show

Commit Message

Rhyland Klein Jan. 14, 2016, 7:24 p.m. UTC
From: Andrew Bresticker <abrestic@chromium.org>

Since the ->enable() callback is called with a spinlock held, we cannot
call potentially blocking functions such as clk_get_rate() or
clk_get_parent(), so use the unlocked versions instead.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
[rklein: Adapted from ChromeOS patch, removing pllu_enable cleanup as
it isn't present upstream]
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
---
 drivers/clk/tegra/clk-pll.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Comments

Thierry Reding Jan. 25, 2016, 12:40 p.m. UTC | #1
On Thu, Jan 14, 2016 at 02:24:34PM -0500, Rhyland Klein wrote:
> From: Andrew Bresticker <abrestic@chromium.org>
> 
> Since the ->enable() callback is called with a spinlock held, we cannot
> call potentially blocking functions such as clk_get_rate() or
> clk_get_parent(), so use the unlocked versions instead.
> 
> Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
> [rklein: Adapted from ChromeOS patch, removing pllu_enable cleanup as
> it isn't present upstream]
> Signed-off-by: Rhyland Klein <rklein@nvidia.com>
> ---
>  drivers/clk/tegra/clk-pll.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)

Applied, thanks.

Thierry
Thierry Reding Jan. 25, 2016, 12:41 p.m. UTC | #2
On Thu, Jan 14, 2016 at 02:24:34PM -0500, Rhyland Klein wrote:
> From: Andrew Bresticker <abrestic@chromium.org>
> 
> Since the ->enable() callback is called with a spinlock held, we cannot
> call potentially blocking functions such as clk_get_rate() or
> clk_get_parent(), so use the unlocked versions instead.
> 
> Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
> [rklein: Adapted from ChromeOS patch, removing pllu_enable cleanup as
> it isn't present upstream]
> Signed-off-by: Rhyland Klein <rklein@nvidia.com>
> ---
>  drivers/clk/tegra/clk-pll.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)

Applied, thanks.

Thierry
diff mbox

Patch

diff --git a/drivers/clk/tegra/clk-pll.c b/drivers/clk/tegra/clk-pll.c
index a534bfab30b3..65156486889a 100644
--- a/drivers/clk/tegra/clk-pll.c
+++ b/drivers/clk/tegra/clk-pll.c
@@ -880,7 +880,7 @@  static int clk_plle_training(struct tegra_clk_pll *pll)
 static int clk_plle_enable(struct clk_hw *hw)
 {
 	struct tegra_clk_pll *pll = to_clk_pll(hw);
-	unsigned long input_rate = clk_get_rate(clk_get_parent(hw->clk));
+	unsigned long input_rate = clk_hw_get_rate(clk_hw_get_parent(hw));
 	struct tegra_clk_pll_freq_table sel;
 	u32 val;
 	int err;
@@ -1378,7 +1378,7 @@  static int clk_plle_tegra114_enable(struct clk_hw *hw)
 	u32 val;
 	int ret;
 	unsigned long flags = 0;
-	unsigned long input_rate = clk_get_rate(clk_get_parent(hw->clk));
+	unsigned long input_rate = clk_hw_get_rate(clk_hw_get_parent(hw));
 
 	if (_get_table_rate(hw, &sel, pll->params->fixed_rate, input_rate))
 		return -EINVAL;
@@ -2014,7 +2014,7 @@  static int clk_plle_tegra210_enable(struct clk_hw *hw)
 	u32 val;
 	int ret;
 	unsigned long flags = 0;
-	unsigned long input_rate = clk_get_rate(clk_get_parent(hw->clk));
+	unsigned long input_rate = clk_hw_get_rate(clk_hw_get_parent(hw));
 
 	if (_get_table_rate(hw, &sel, pll->params->fixed_rate, input_rate))
 		return -EINVAL;